﻿<html lang="en-US" xmlns:maml="http://schemas.microsoft.com/maml/2004/10" xmlns:dev="http://schemas.microsoft.com/maml/dev/2004/10" xmlns:command="http://schemas.microsoft.com/maml/dev/command/2004/10" xmlns:macua="http://ns.microsoft.com/macua" xmlns:msxsl="urn:schemas-microsoft-com:xslt" xmlns:macuaXT="urn:macua/XT"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><meta name="assetID" content="d53e77b9-d020-468e-aee7-72ea45b361f3" /><title>Authentication options</title><link rel="stylesheet" type="text/css" href="map/MacOffice.css" /><link rel="stylesheet" type="text/css" href="map/MacOffice1.css" disabled="true" /><link rel="stylesheet" type="text/css" href="map/MacOffice2.css" disabled="true" /><link rel="stylesheet" type="text/css" href="map/MacOffice3.css" disabled="true" /><link rel="stylesheet" type="text/css" href="map/MacOffice4.css" disabled="true" /><link rel="stylesheet" type="text/css" href="map/MacOfficePrnt.css" /><style type="text/css">
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				</script><script type="text/javascript" src="map/MacOffice.js">';</script></head><body onclick="hide()" onload="init()"><div id="main" class="main"><div id="header" class="header"><p style="padding-top:2px;" /></div><div class="title"><h1 style="font-size:14pt;">Authentication options</h1></div><div class="content"><div><p>Remote computer authentication verifies that you are connecting to the correct Windows-based computer. There are three available authentication options.</p><div class="ul"><ul><li> 
				<p><span class="bold">Always connect, even if authentication fails</span></p>
				<p>Even if Remote Desktop Connection
					cannot verify the identity of the Windows-based computer, it connects anyway. This is the least secure authentication option.</p>
				<div class="alert2"><p><span class="note">Note </span>If a Windows-based computer is running Windows XP 
				or earlier, or Windows Server 2003
				Service Pack 1 (SP1) or earlier, it cannot provide its identity for verification.
							If you know that the Windows-based computer is running one of those earlier operating systems, you can avoid authentication warnings by choosing <span class="bold">Always connect, even if authentication fails</span>.</p> 
						
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			</li><li> 
				<p><span class="bold">Warn me if authentication fails (default setting)</span></p>
				<p>If Remote Desktop Connection
					cannot verify the identity of the Windows-based computer, it warns you so that you can choose whether to continue with the connection. This authentication option enhances security compared to the <span class="bold">Always connect, even if authentication fails</span> option.</p>
			</li><li> 
				<p><span class="bold">Do not connect if authentication fails</span></p>
				<p>If Remote Desktop Connection
					cannot verify the identity of the Windows-based computer, you won't be able to connect. This authentication option uses enhanced security features when you connect to a computer that is running Windows Vista. This authentication option enhances security compared to the other two authentication options.</p>
				<div class="alert2"><p><span class="note">Note </span>If you select this option, you won't be able to connect to computers that are running versions of the Windows
							operating system that are earlier than Windows Vista.</p> 
						
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			</li></ul></div></div></div><div class="related"><div class="content"><h3>See also</h3><p><a onclick="cancel(event)" href="a776418a-8908-4345-9420-df141247602c.htm">I can't connect to the Windows-based computer</a></p></div></div><div class="footer"> </div></div><div id="defDiv" class="defdiv" onclick="cancel(event)" /></body></html>